From 177f8547e3b99def7e9f9bc0878a151814954857 Mon Sep 17 00:00:00 2001
From: Axel Burri <axel@tty0.ch>
Date: Tue, 8 Feb 2022 01:03:32 +0100
Subject: [PATCH] btrbk: add backend btrfs-progs-doas

---
 btrbk               | 9 +++++----
 ssh_filter_btrbk.sh | 3 ++-
 2 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/btrbk b/btrbk
index 729b6b9..c428909 100755
--- a/btrbk
+++ b/btrbk
@@ -136,10 +136,10 @@ my %config_options = (
   group                       => { default => undef,     accept_regexp => qr/^$group_match($split_match$group_match)*$/, allow_multiple => 1, split => $split_match },
   noauto                      => { default => undef,     accept => [ "yes", "no" ] },
 
-  backend                     => { default => "btrfs-progs", accept => [       "btrfs-progs", "btrfs-progs-btrbk", "btrfs-progs-sudo" ] },
-  backend_local               => { default => undef,         accept => [ "no", "btrfs-progs", "btrfs-progs-btrbk", "btrfs-progs-sudo" ] },
-  backend_remote              => { default => undef,         accept => [ "no", "btrfs-progs", "btrfs-progs-btrbk", "btrfs-progs-sudo" ] },
-  backend_local_user          => { default => undef,         accept => [ "no", "btrfs-progs", "btrfs-progs-btrbk", "btrfs-progs-sudo" ] },
+  backend                     => { default => "btrfs-progs", accept => [       "btrfs-progs", "btrfs-progs-btrbk", "btrfs-progs-sudo", "btrfs-progs-doas" ] },
+  backend_local               => { default => undef,         accept => [ "no", "btrfs-progs", "btrfs-progs-btrbk", "btrfs-progs-sudo", "btrfs-progs-doas" ] },
+  backend_remote              => { default => undef,         accept => [ "no", "btrfs-progs", "btrfs-progs-btrbk", "btrfs-progs-sudo", "btrfs-progs-doas" ] },
+  backend_local_user          => { default => undef,         accept => [ "no", "btrfs-progs", "btrfs-progs-btrbk", "btrfs-progs-sudo", "btrfs-progs-doas" ] },
 
   compat                      => { default => undef,     accept => [ "no", "busybox" ] },
   compat_local                => { default => undef,     accept => [ "no", "busybox" ] },
@@ -325,6 +325,7 @@ my @system_cmd = (
 my %backend_cmd_map = (
   "btrfs-progs-btrbk" => { map +( $_ => [ s/ /-/gr ] ), @btrfs_cmd },
   "btrfs-progs-sudo"  => { map +( $_ => [ qw( sudo -n ), split(" ", $_) ] ), @btrfs_cmd, @system_cmd },
+  "btrfs-progs-doas"  => { map +( $_ => [ qw( doas -n ), split(" ", $_) ] ), @btrfs_cmd, @system_cmd },
 );
 
 # keys used in raw target sidecar files (.info):
diff --git a/ssh_filter_btrbk.sh b/ssh_filter_btrbk.sh
index c1d47b7..5952f2e 100755
--- a/ssh_filter_btrbk.sh
+++ b/ssh_filter_btrbk.sh
@@ -105,6 +105,7 @@ reject_filtered_cmd()
 sudo_prefix=
 for key; do
     [[ "$key" == "--sudo" ]] && sudo_prefix="sudo -n "
+    [[ "$key" == "--doas" ]] && sudo_prefix="doas -n "
 done
 
 while [[ "$#" -ge 1 ]]; do
@@ -115,7 +116,7 @@ while [[ "$#" -ge 1 ]]; do
           enable_log=1
           ;;
 
-      --sudo)
+      --sudo|--doas)
           # already processed above
           ;;